The Reason Why. Robert Kemp Philp

       Caloric, what are the effects of it, 74

       Caloric, why is it called a repulsive agent, 75

       Caloric, how may it be excited to develope heat, 79

       Caloric, is there any in ice, snow, water, marble, &c., 89

       Caloric, how do we measure the quantity of in any substance, 329

       Caloric, how does it travel, 332

       Caloric, how do we know that it is caloric which fuses metals, 334

       Calves and lambs, why have they no horns, 1069

       Camel, why has its stomach a number of distinct bags, 1065

       Candles, why do tallow require snuffing, 264

       LESSON XIII.

       Candles, why do composite and wax not require snuffing, 265

       Candle, what becomes of it after it is burnt, 269

       Capillary blood-vessels, why are they found in every part of the system, 919

       Capillary attraction, what is it, 780

       Carbonic acid gas, how is it formed, 9

       Carbonic acid gas, what becomes of it, 10

       Carbonic acid gas, is it heavier or lighter than air, 11

       Carbonic acid gas, what are the chief sources of, 16

       Carbonic acid gas, what is its effect upon the human system, 21

       Carbonic acid gas, what becomes of that formed by combustion, 59

       Carbonic acid gas, what proportion is dangerous to life, 60

       Carbonic acid, what is it, 798

       Carbonic acid, where does it chiefly exist, 799

       Carbonic acid, what are its pure states, 800

       Carbon, what is it, 18

       Carbon, will it produce flame when burnt in oxygen, 106

       Carbon and hydrogen, what differences characterise the combustion of, 268

       LESSON XIV.

       Carbon, what is the purest form of it, 277

       Card, why do the images on each side blend while a card is revolving, 846

       Caterpillars, why do they appear in the spring, 1289

       Caterpillars, why do they eat voraciously, 1290

       Caterpillars, why do they pass into the state of the chrysalis, 1291

       Caterpillars, why do they become torpid in the chrysalis, 1292

       Caterpillars, why do they attach themselves to the leaves of plants when in the chrysalis, 1294

       Cats, &c., why do they see in the dark, 981

       Cats' eyes, why are the pupils of nearly closed by day, 982

       Cats, &c., why have they whiskers, 1096

       Cattle, why if they run round in meadows may thunder be expected, 1122

       Ceiling, how did Mr. Sands walk on the, 664

       Champagne, why does it effervesce, 806

       Champagne, why do bubbles rise from it in two or three columns, 807

       Charcoal, why is it dangerous to burn it in rooms, 20

       LESSON XV.

       Charcoal fires, why do they not give flames, 107

       Charcoal, what is it, 275

       Charcoal, why does it act as a disinfectant, 809

       Chicory, what is it, 1196

       Chimney, why does it cease smoking after the fire has been lighted a little while, 680

       Chimney, why does a long one create a better draught than a short one, 681

       Chimneys, why do some smoke when windows and doors are closed, 683

       Chimneys that stand under elevated objects, why do they smoke, 685

       Chimneys, why do sooty smoke, 687

       Chimneys, why do they smoke in damp and gusty weather, 688

       Chimney, why does it smoke when first lighted, 679

       Chocolate, what is it, 1194

       Circulation, why are the venous blood and chyle sent to the lungs, 887

       Circulation, what is the course of the arterial blood, 888

       Circulation, why does the blood impart vitality, 891

       LESSON XVI.

       Circulation, how do we know the blood is alive, 892

       Circulation, why does the blood circulate, 893

       Circulation, how is the body renewed by the blood, 894

       Circulation, how does the blood return to the lungs after it has reached the extremities, 895

       Circulation, why are the veins more perceptible than the arteries, 897

       Circulation, why when we prick the flesh does it bleed, 893

       Circulation, what occurs during the, 899

       Circulation, what becomes of the matter collected by the blood, 901

       Circulation, how is the blood propelled through the arteries, 916

       Circulation, why are the capillary vessels capable of receiving the quantity of blood sent through larger vessels, 917

       Cinnamon, where is it produced, 1239

       Cleanliness, why does it promote health, 1015

       Clothes on fire, why should persons